What influences the formation of species in nature?

New types of living organisms appear in nature, first of all, due to the variability of environmental factors. The climate, food supply, precipitation and terrain, where the population of this species lives, are changing. The body reacts to these changes by adaptation, that is, it adapts to new living conditions. As a result, this adaptation changes the body over several generations, and these changes begin to be transmitted at the genetic level, as a result of which a new species appears.